kernel/linux.git/drivers/ssb/main.c, branch v6.12.80

driver core: have match() callback in struct bus_type take a const *

2024-07-03T13:16:54+00:00

In the match() callback, the struct device_driver * should not be changed, so change the function callback to be a const *. This is one step of many towards making the driver core safe to have struct device_driver in read-only memory. Because the match() callback is in all busses, all busses are modified to handle this properly. This does entail switching some container_of() calls to container_of_const() to properly handle the constant *. For some busses, like PCI and USB and HV, the const * is cast away in the match callback as those busses do want to modify those structures at this point in time (they have a local lock in the driver structure.) That will have to be changed in the future if they wish to have their struct device * in read-only-memory. Cc: Rafael J. Wysocki Reviewed-by: Alex Elder Acked-by: Sumit Garg Link: https://lore.kernel.org/r/2024070136-wrongdoer-busily-01e8@gregkh Signed-off-by: Greg Kroah-Hartman

ssb: use "break" on default case to prevent warning

2024-03-14T08:56:31+00:00

Having an empty default: case in a switch statement causes a warning (when using Clang; I don't see the warning when using gcc), so add a "break;" to the default case to prevent the warning: drivers/ssb/main.c:1149:2: warning: label at end of compound statement is a C2x extension [-Wc2x-extensions] Fixes: e27b02e23a70 ("ssb: drop use of non-existing CONFIG_SSB_DEBUG symbol") Signed-off-by: Randy Dunlap Reported-by: kernel test robot Closes: https://lore.kernel.org/oe-kbuild-all/202403130717.TWm17FiD-lkp@intel.com/ Cc: Michael Büsch Cc: linux-wireless@vger.kernel.org Cc: Kalle Valo Cc: Johannes Berg Cc: llvm@lists.linux.dev Acked-by: Michael Büsch Reviewed-by: Nathan Chancellor Signed-off-by: Kalle Valo Link: https://msgid.link/20240313001305.18820-1-rdunlap@infradead.org

ssb: drop use of non-existing CONFIG_SSB_DEBUG symbol

2024-03-12T15:33:41+00:00

CONFIG_SSB_DEBUG is used in one header file and nowhere else, so remove it and the now-empty inline function that contained it. Also remove the call to the empty inline function. The empty "default:" case is kept to prevent 2 compiler warnings: drivers/ssb/main.c:1133:9: warning: enumeration value 'SSB_BUSTYPE_PCMCIA' not handled in switch [-Wswitch] drivers/ssb/main.c:1133:9: warning: enumeration value 'SSB_BUSTYPE_SDIO' not handled in switch [-Wswitch] Reported-by: Ying Sun Link: https://lore.kernel.org/lkml/4e8525fe.607e2.18a8ddfdce8.Coremail.sunying@isrc.iscas.ac.cn/ Signed-off-by: Randy Dunlap Cc: Michael Büsch Cc: linux-wireless@vger.kernel.org Cc: Kalle Valo Acked-by: Michael Büsch Signed-off-by: Kalle Valo Link: https://msgid.link/20240309224540.22682-1-rdunlap@infradead.org

ssb: Fix potential NULL pointer dereference in ssb_device_uevent()

2024-03-12T15:31:11+00:00

The ssb_device_uevent() function first attempts to convert the 'dev' pointer to 'struct ssb_device *'. However, it mistakenly dereferences 'dev' before performing the NULL check, potentially leading to a NULL pointer dereference if 'dev' is NULL. To fix this issue, move the NULL check before dereferencing the 'dev' pointer, ensuring that the pointer is valid before attempting to use it. Found by Linux Verification Center (linuxtesting.org) with SVACE. Signed-off-by: Rand Deeb Signed-off-by: Kalle Valo Link: https://msgid.link/20240306123028.164155-1-rand.sec96@gmail.com

ssb: make ssb_bustype const

2024-02-06T18:07:12+00:00

Now that the driver core can properly handle constant struct bus_type, move the ssb_bustype variable to be a constant structure as well, placing it into read-only memory which can not be modified at runtime. Cc: Greg Kroah-Hartman Suggested-by: Greg Kroah-Hartman Signed-off-by: Ricardo B. Marliere Acked-by: Michael Büsch Reviewed-by: Greg Kroah-Hartman Signed-off-by: Kalle Valo Link: https://msgid.link/20240204-bus_cleanup-ssb-v1-1-511026cd5f3c@marliere.net

ssb: Fix division by zero issue in ssb_calc_clock_rate

2023-09-07T06:00:05+00:00

In ssb_calc_clock_rate(), there is a potential issue where the value of m1 could be zero due to initialization using clkfactor_f6_resolv(). This situation raised concerns about the possibility of a division by zero error. We fixed it by following the suggestions provided by Larry Finger and Michael Büsch . The fix involves returning a value of 1 instead of 0 in clkfactor_f6_resolv(). This modification ensures the proper functioning of the code and eliminates the risk of division by zero errors. Signed-off-by: Rand Deeb Acked-by: Larry Finger Acked-by: Michael Büsch Signed-off-by: Kalle Valo Link: https://lore.kernel.org/r/20230904232346.34991-1-rand.sec96@gmail.com

driver core: make struct bus_type.uevent() take a const *

2023-01-27T12:45:52+00:00

The uevent() callback in struct bus_type should not be modifying the device that is passed into it, so mark it as a const * and propagate the function signature changes out into all relevant subsystems that use this callback. Acked-by: Rafael J. Wysocki Acked-by: Hans de Goede Link: https://lore.kernel.org/r/20230111113018.459199-16-gregkh@linuxfoundation.org Signed-off-by: Greg Kroah-Hartman

bus: Make remove callback return void

2021-07-21T09:53:42+00:00

The driver core ignores the return value of this callback because there is only little it can do when a device disappears. This is the final bit of a long lasting cleanup quest where several buses were converted to also return void from their remove callback. Additionally some resource leaks were fixed that were caused by drivers returning an error code in the expectation that the driver won't go away. With struct bus_type::remove returning void it's prevented that newly implemented buses return an ignored error code and so don't anticipate wrong expectations for driver authors. Reviewed-by: Tom Rix (For fpga) Reviewed-by: Mathieu Poirier Reviewed-by: Cornelia Huck (For drivers/s390 and drivers/vfio) Acked-by: Russell King (Oracle) (For ARM, Amba and related parts) Acked-by: Mark Brown Acked-by: Chen-Yu Tsai (for sunxi-rsb) Acked-by: Pali Rohár Acked-by: Mauro Carvalho Chehab (for media) Acked-by: Hans de Goede (For drivers/platform) Acked-by: Alexandre Belloni Acked-By: Vinod Koul Acked-by: Juergen Gross (For xen) Acked-by: Lee Jones (For mfd) Acked-by: Johannes Thumshirn (For mcb) Acked-by: Johan Hovold Acked-by: Srinivas Kandagatla (For slimbus) Acked-by: Kirti Wankhede (For vfio) Acked-by: Maximilian Luz Acked-by: Heikki Krogerus (For ulpi and typec) Acked-by: Samuel Iglesias Gonsálvez (For ipack) Acked-by: Geoff Levand (For ps3) Acked-by: Yehezkel Bernat (For thunderbolt) Acked-by: Alexander Shishkin (For intel_th) Acked-by: Dominik Brodowski (For pcmcia) Acked-by: Rafael J. Wysocki (For ACPI) Acked-by: Bjorn Andersson (rpmsg and apr) Acked-by: Srinivas Pandruvada (For intel-ish-hid) Acked-by: Dan Williams (For CXL, DAX, and NVDIMM) Acked-by: William Breathitt Gray (For isa) Acked-by: Stefan Richter (For firewire) Acked-by: Benjamin Tissoires (For hid) Acked-by: Thorsten Scherer (For siox) Acked-by: Sven Van Asbroeck (For anybuss) Acked-by: Ulf Hansson (For MMC) Acked-by: Wolfram Sang # for I2C Acked-by: Sudeep Holla Acked-by: Geert Uytterhoeven Acked-by: Dmitry Torokhov Acked-by: Finn Thain Signed-off-by: Uwe Kleine-König Link: https://lore.kernel.org/r/20210713193522.1770306-6-u.kleine-koenig@pengutronix.de Signed-off-by: Greg Kroah-Hartman

ssb: remove unreachable code

2021-06-15T10:11:34+00:00

The return value of ssb_bus_unregister can only be 0 or -1, so this condition if (err == -EBUSY) will not hold, so delete it. Signed-off-by: Tian Tao Acked-by: Michael Büsch Signed-off-by: Kalle Valo Link: https://lore.kernel.org/r/1621306352-3632-1-git-send-email-tiantao6@hisilicon.com

ssb: Remove redundant assignment to err

2021-06-15T10:10:16+00:00

Variable 'err' is set to zero but this value is never read as it is overwritten with a new value later on, hence it is a redundant assignment and can be removed. Clean up the following clang-analyzer warning: drivers/ssb/main.c:1306:3: warning: Value stored to 'err' is never read [clang-analyzer-deadcode.DeadStores] drivers/ssb/main.c:1312:3: warning: Value stored to 'err' is never read [clang-analyzer-deadcode.DeadStores] Reported-by: Abaci Robot Signed-off-by: Yang Li Acked-by: Michael Büsch Signed-off-by: Kalle Valo Link: https://lore.kernel.org/r/1619693230-108804-1-git-send-email-yang.lee@linux.alibaba.com