Thank you Matthias for the patch. Regards, Sumant -----Original Message----- From: Matthias Kaehlcke [mailto:matthias.kaehlcke@xxxxxxxxx] Sent: Sunday, July 01, 2007 9:29 AM To: DL-MegaRAID Linux; linux-scsi@xxxxxxxxxxxxxxx Cc: linux-kernel@xxxxxxxxxxxxxxx; akpm@xxxxxxxxxxxxxxxxxxxx Subject: [PATCH 1/5] use mutex instead of semaphore in Megaraid Mailbox driver The Megaraid Mailbox driver uses a semaphore as mutex. Use the mutex API instead of the (binary) semaphore. Signed-off-by: Matthias Kaehlcke <matthias.kaehlcke@xxxxxxxxx> -- diff --git a/drivers/scsi/megaraid/mega_common.h b/drivers/scsi/megaraid/mega_common.h index 26e1e6c..fef9ac9 100644 --- a/drivers/scsi/megaraid/mega_common.h +++ b/drivers/scsi/megaraid/mega_common.h @@ -21,6 +21,7 @@ #include <linux/types.h> #include <linux/pci.h> #include <linux/spinlock.h> +#include <linux/mutex.h> #include <linux/interrupt.h> #include <linux/delay.h> #include <linux/blkdev.h> diff --git a/drivers/scsi/megaraid/megaraid_mbox.c b/drivers/scsi/megaraid/megaraid_mbox.c index 04d0b69..2cecc64 100644 --- a/drivers/scsi/megaraid/megaraid_mbox.c +++ b/drivers/scsi/megaraid/megaraid_mbox.c @@ -3957,7 +3957,7 @@ megaraid_sysfs_alloc_resources(adapter_t *adapter) megaraid_sysfs_free_resources(adapter); } - sema_init(&raid_dev->sysfs_sem, 1); + mutex_init(&raid_dev->sysfs_mtx); init_waitqueue_head(&raid_dev->sysfs_wait_q); @@ -4058,7 +4058,7 @@ megaraid_sysfs_get_ldmap(adapter_t *adapter) /* * Allow only one read at a time to go through the sysfs attributes */ - down(&raid_dev->sysfs_sem); + mutex_lock(&raid_dev->sysfs_mtx); uioc = raid_dev->sysfs_uioc; mbox64 = raid_dev->sysfs_mbox64; @@ -4134,7 +4134,7 @@ megaraid_sysfs_get_ldmap(adapter_t *adapter) del_timer_sync(timerp); - up(&raid_dev->sysfs_sem); + mutex_unlock(&raid_dev->sysfs_mtx); return rval; } diff --git a/drivers/scsi/megaraid/megaraid_mbox.h b/drivers/scsi/megaraid/megaraid_mbox.h index 9de803c..626459d 100644 --- a/drivers/scsi/megaraid/megaraid_mbox.h +++ b/drivers/scsi/megaraid/megaraid_mbox.h @@ -168,7 +168,7 @@ typedef struct { * @hw_error : set if FW not responding * @fast_load : If set, skip physical device scanning * @channel_class : channel class, RAID or SCSI - * @sysfs_sem : semaphore to serialize access to sysfs res. + * @sysfs_mtx : mutex to serialize access to sysfs res. * @sysfs_uioc : management packet to issue FW calls from sysfs * @sysfs_mbox64 : mailbox packet to issue FW calls from sysfs * @sysfs_buffer : data buffer for FW commands issued from sysfs @@ -208,7 +208,7 @@ typedef struct { int hw_error; int fast_load; uint8_t channel_class; - struct semaphore sysfs_sem; + struct mutex sysfs_mtx; uioc_t *sysfs_uioc; mbox64_t *sysfs_mbox64; caddr_t sysfs_buffer; -- Matthias Kaehlcke Linux Application Developer Barcelona An ounce of practice is worth more than tons of preaching (Mahatma Gandhi) .''`. using free software / Debian GNU/Linux | http://debian.org : :' : `. `'` gpg --keyserver pgp.mit.edu --recv-keys 47D8E5D4 `- - To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
