kernel/linux.git/drivers/auxdisplay/ks0108.c, branch linux-4.16.y

auxdisplay: ks0108: initialize local parport variable

2015-08-15T00:27:17+00:00

The local variable ks0108_parport is used by other functions to write to the parallel port. We missed initializing it when we converted the driver to use new Parallel Port codes. Fixes: 4edd70c133f3 ("auxdisplay: ks0108: use new parport device model") Reported-by: Fengguang Wu Signed-off-by: Sudip Mukherjee Signed-off-by: Greg Kroah-Hartman

auxdisplay: ks0108: use new parport device model

2015-08-05T20:36:49+00:00

Modify auxdisplay driver to use the new parallel port device model. Signed-off-by: Sudip Mukherjee Signed-off-by: Greg Kroah-Hartman

auxdisplay: ks0108: use min_t

2015-08-05T20:36:49+00:00

Using min_t() is preffered than using min(). Signed-off-by: Sudip Mukherjee Signed-off-by: Greg Kroah-Hartman

auxdisplay: ks0108: start using pr_*

2015-08-05T20:36:48+00:00

Start using pr_* macros instead of using printk and in the process define pr_fmt. Signed-off-by: Sudip Mukherjee Signed-off-by: Greg Kroah-Hartman

auxdisplay: ks0108: fix refcount

2015-08-05T20:36:48+00:00

parport_find_base() will implicitly do parport_get_port() which increases the refcount. Then parport_register_device() will again increment the refcount. But while unloading the module we are only doing parport_unregister_device() decrementing the refcount only once. We add an parport_put_port() to neutralize the effect of parport_get_port(). Cc: # 2.6.32+ Signed-off-by: Sudip Mukherjee Signed-off-by: Greg Kroah-Hartman

Miguel Ojeda has moved

2008-07-04T17:40:05+00:00

Signed-off-by: Miguel Ojeda Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[PATCH] cfag12864b: fix crash when built-in and no parport present

2007-02-21T01:10:14+00:00

The problem comes when ks0108/cfag12864b are built-in and no parallel port is present. ks0108_init() is called first, as it should be, but fails to load (as there is no parallel port to use). After that, cfag12864b_init() gets called, without knowing anything about ks0108 failed, and calls ks0108_writecontrol(), which dereferences an uninitialized pointer. Init order is OK, I think. The problem is how to stop cfag12864b_init() being called if ks0108 failed to load. modprobe does it for us, but, how when built-in? Signed-off-by: Miguel Ojeda Sandonis Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[PATCH] drivers: add LCD support

2007-02-11T18:51:24+00:00

Add support for auxiliary displays, the ks0108 LCD controller, the cfag12864b LCD and adds a framebuffer device: cfag12864bfb. - Add a "auxdisplay/" folder in "drivers/" for auxiliary display drivers. - Add support for the ks0108 LCD Controller as a device driver. (uses parport interface) - Add support for the cfag12864b LCD as a device driver. (uses ks0108 LCD Controller driver) - Add a framebuffer device called cfag12864bfb. (uses cfag12864b LCD driver) - Add the usual Documentation, includes, Makefiles, Kconfigs, MAINTAINERS, CREDITS... - Miguel Ojeda will maintain all the stuff above. [rdunlap@xenotime.net: workqueue fixups] [akpm@osdl.org: kconfig fix] Signed-off-by: Miguel Ojeda Sandonis Cc: Greg KH Acked-by: Paulo Marques Cc: "Randy.Dunlap" Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds