kernel/linux.git/drivers/ata/pata_platform.c, branch v6.1.168

ata: pata_platform: Make use of platform_get_mem_or_io()

2022-01-31T00:58:31+00:00

Make use of platform_get_mem_or_io() to simplify the code. While at it, drop use of unlikely() from pata_platform_probe() as it isn't a hotpath. Signed-off-by: Lad Prabhakar Reviewed-by: Sergey Shtylyov Signed-off-by: Damien Le Moal

ata: pata_platform: Fix a NULL pointer dereference in __pata_platform_probe()

2022-01-27T02:22:43+00:00

In __pata_platform_probe(), devm_kzalloc() is assigned to ap->ops and there is a dereference of it right after that, which could introduce a NULL pointer dereference bug. Fix this by adding a NULL check of ap->ops. This bug was found by a static analyzer. Builds with 'make allyesconfig' show no new warnings, and our static analyzer no longer warns about this code. Fixes: f3d5e4f18dba ("ata: pata_of_platform: Allow to use 16-bit wide data transfer") Signed-off-by: Zhou Qingyang Signed-off-by: Damien Le Moal Reviewed-by: Sergey Shtylyov

pata_platform: Document `pio_mask' module parameter

2021-04-06T15:27:30+00:00

Add MODULE_PARM_DESC documentation and a kernel-parameters.txt entry. Signed-off-by: Maciej W. Rozycki Reviewed-by: Christoph Hellwig Link: https://lore.kernel.org/r/alpine.DEB.2.21.2103212023190.21463@angie.orcam.me.uk Signed-off-by: Jens Axboe

ata: pata_platform: Add IRQF_SHARED to IRQ flags

2019-02-08T13:42:55+00:00

It's quite possible that multiple devices can be hooked up to the same interrupt line with the processor. So add IRQF_SHARED in request irq. Acked-by: Bartlomiej Zolnierkiewicz Signed-off-by: Alexander Shiyan Signed-off-by: Jens Axboe

ata: pata_of_platform: Allow to use 16-bit wide data transfer

2019-02-08T13:42:53+00:00

In some cases, the system bus can be configured for 16-bit mode, in this case using read/write functions for 32-bit values results in two cycles of 16 bits each, which is wrong. This patch adds the devicetree flag to switch the driver to use 16-bit mode for I/O transfers. Acked-by: Bartlomiej Zolnierkiewicz Signed-off-by: Alexander Shiyan Signed-off-by: Jens Axboe

libata: remove ata_sff_data_xfer_noirq()

2018-07-11T17:45:28+00:00

ata_sff_data_xfer_noirq() is invoked via the ->sff_data_xfer hook. The latter is invoked by ata_pio_sector(), atapi_send_cdb() and __atapi_pio_bytes() which in turn is invoked by ata_sff_hsm_move(). The latter function requires that the "ap->lock" lock is held which needs to be taken with disabled interrupts. There is no need have to have ata_sff_data_xfer_noirq() which invokes ata_sff_data_xfer32() with disabled interrupts because at this point the interrupts are already disabled. Remove the function and its references to it and replace all callers with ata_sff_data_xfer32(). Signed-off-by: Sebastian Andrzej Siewior Signed-off-by: Tejun Heo

ata: pata_platform: fix owner module reference mismatch for scsi host

2015-01-28T23:45:23+00:00

The owner module reference of the pata_of_platform's scsi_host is initialized to pata_platform's one, because pata_of_platform driver use a scsi_host_template defined in pata_platform. So this drivers can be unloaded even if the scsi device is being accessed. This fixes it by propagating the scsi_host_template to pata_of_platform driver. The scsi_host_template is passed through a new argument of __pata_platform_probe(). Signed-off-by: Akinobu Mita Signed-off-by: Tejun Heo Cc: Hans de Goede Cc: Christoph Hellwig Cc: "James E.J. Bottomley" Cc: linux-ide@vger.kernel.org Cc: linux-scsi@vger.kernel.org

ata: drop owner assignment from platform_drivers

2014-10-20T14:20:17+00:00

A platform_driver does not need to set an owner, it will be populated by the driver core. Signed-off-by: Wolfram Sang

pata_platform: Remove useless irq_flags field

2014-08-23T17:05:08+00:00

IRQ flags can be obtained from resource structure, there are no need to use additional field in the platform_data to store these values. This patch removes this field and convert existing users of this driver to use IRQ flags from the resources. Signed-off-by: Alexander Shiyan Signed-off-by: Tejun Heo

ata: delete non-required instances of include

2014-02-13T21:40:56+00:00

None of these files are actually using any __init type directives and hence don't need to include . Most are just a left over from __devinit and __cpuinit removal, or simply due to code getting copied from one driver to the next. Cc: linux-ide@vger.kernel.org Signed-off-by: Paul Gortmaker Signed-off-by: Tejun Heo