From bc35b4e347c047fb1c665bb761ddb22482539f7f Mon Sep 17 00:00:00 2001 From: Tilman Schmidt Date: Sun, 14 Mar 2010 12:58:05 +0000 Subject: gigaset: avoid registering CAPI driver more than once Registering/unregistering the Gigaset CAPI driver when a device is connected/disconnected causes an Oops when disconnecting two Gigaset devices in a row, because the same capi_driver structure gets unregistered twice. Fix by making driver registration/unregistration a separate operation (empty in the ISDN4Linux case) called when the main module is loaded/unloaded. Impact: bugfix Signed-off-by: Tilman Schmidt Acked-by: Karsten Keil CC: stable@kernel.org Signed-off-by: David S. Miller --- drivers/isdn/gigaset/i4l.c | 28 ++++++++++++++++++++-------- 1 file changed, 20 insertions(+), 8 deletions(-) (limited to 'drivers/isdn/gigaset/i4l.c') diff --git a/drivers/isdn/gigaset/i4l.c b/drivers/isdn/gigaset/i4l.c index f0acb9dc9e33..c22e5ace8276 100644 --- a/drivers/isdn/gigaset/i4l.c +++ b/drivers/isdn/gigaset/i4l.c @@ -592,15 +592,13 @@ void gigaset_isdn_stop(struct cardstate *cs) } /** - * gigaset_isdn_register() - register to LL + * gigaset_isdn_regdev() - register to LL * @cs: device descriptor structure. * @isdnid: device name. * - * Called by main module to register the device with the LL. - * * Return value: 1 for success, 0 for failure */ -int gigaset_isdn_register(struct cardstate *cs, const char *isdnid) +int gigaset_isdn_regdev(struct cardstate *cs, const char *isdnid) { isdn_if *iif; @@ -650,15 +648,29 @@ int gigaset_isdn_register(struct cardstate *cs, const char *isdnid) } /** - * gigaset_isdn_unregister() - unregister from LL + * gigaset_isdn_unregdev() - unregister device from LL * @cs: device descriptor structure. - * - * Called by main module to unregister the device from the LL. */ -void gigaset_isdn_unregister(struct cardstate *cs) +void gigaset_isdn_unregdev(struct cardstate *cs) { gig_dbg(DEBUG_CMD, "sending UNLOAD"); gigaset_i4l_cmd(cs, ISDN_STAT_UNLOAD); kfree(cs->iif); cs->iif = NULL; } + +/** + * gigaset_isdn_regdrv() - register driver to LL + */ +void gigaset_isdn_regdrv(void) +{ + /* nothing to do */ +} + +/** + * gigaset_isdn_unregdrv() - unregister driver from LL + */ +void gigaset_isdn_unregdrv(void) +{ + /* nothing to do */ +} -- cgit From 5a0e3ad6af8660be21ca98a971cd00f331318c05 Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Wed, 24 Mar 2010 17:04:11 +0900 Subject: include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by: Tejun Heo Guess-its-ok-by: Christoph Lameter Cc: Ingo Molnar Cc: Lee Schermerhorn --- drivers/isdn/gigaset/i4l.c | 1 + 1 file changed, 1 insertion(+) (limited to 'drivers/isdn/gigaset/i4l.c') diff --git a/drivers/isdn/gigaset/i4l.c b/drivers/isdn/gigaset/i4l.c index c22e5ace8276..c99fb9790a13 100644 --- a/drivers/isdn/gigaset/i4l.c +++ b/drivers/isdn/gigaset/i4l.c @@ -15,6 +15,7 @@ #include "gigaset.h" #include +#include #define HW_HDR_LEN 2 /* Header size used to store ack info */ -- cgit From b91ecb0027c7171c83d7cf443a22c39b1fde6d83 Mon Sep 17 00:00:00 2001 From: Tilman Schmidt Date: Fri, 16 Apr 2010 12:08:58 +0000 Subject: gigaset: include cleanup cleanup Commit 5a0e3ad causes slab.h to be included twice in many of the Gigaset driver's source files, first via the common include file gigaset.h and then a second time directly. Drop the spares, and use the opportunity to clean up a few more similar cases. Impact: cleanup, no functional change Signed-off-by: Tilman Schmidt CC: Tejun Heo Acked-by: Tejun Heo Signed-off-by: David S. Miller --- drivers/isdn/gigaset/i4l.c | 1 - 1 file changed, 1 deletion(-) (limited to 'drivers/isdn/gigaset/i4l.c') diff --git a/drivers/isdn/gigaset/i4l.c b/drivers/isdn/gigaset/i4l.c index c99fb9790a13..c22e5ace8276 100644 --- a/drivers/isdn/gigaset/i4l.c +++ b/drivers/isdn/gigaset/i4l.c @@ -15,7 +15,6 @@ #include "gigaset.h" #include -#include #define HW_HDR_LEN 2 /* Header size used to store ack info */ -- cgit