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| author | Michael Ernst <mernst@de.ibm.com> | 2008-04-17 07:46:01 +0200 |
|---|---|---|
| committer | Heiko Carstens <heiko.carstens@de.ibm.com> | 2008-04-17 07:46:57 +0200 |
| commit | 8284fb19efa1f11ea8dd213e9e227fc1fcb20586 (patch) | |
| tree | f91933a4ee9e253bd25c3a98df0d67ee946bb41e /drivers/s390/cio/chsc.c | |
| parent | fe6173d9b33dba18ec462051750fb1b9abcd796d (diff) | |
| download | kernel_samsung_smdk4412-8284fb19efa1f11ea8dd213e9e227fc1fcb20586.zip kernel_samsung_smdk4412-8284fb19efa1f11ea8dd213e9e227fc1fcb20586.tar.gz kernel_samsung_smdk4412-8284fb19efa1f11ea8dd213e9e227fc1fcb20586.tar.bz2 | |
[S390] cio: fix parallel cm_enable processing.
It is now possible to trigger cm_enable processing several times in
parallel without causing a kernel panic.
Signed-off-by: Michael Ernst <mernst@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Diffstat (limited to 'drivers/s390/cio/chsc.c')
| -rw-r--r-- | drivers/s390/cio/chsc.c | 3 |
1 files changed, 0 insertions, 3 deletions
diff --git a/drivers/s390/cio/chsc.c b/drivers/s390/cio/chsc.c index b6a40c2..5de8690 100644 --- a/drivers/s390/cio/chsc.c +++ b/drivers/s390/cio/chsc.c @@ -766,7 +766,6 @@ chsc_secm(struct channel_subsystem *css, int enable) if (!secm_area) return -ENOMEM; - mutex_lock(&css->mutex); if (enable && !css->cm_enabled) { css->cub_addr1 = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); css->cub_addr2 = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA); @@ -774,7 +773,6 @@ chsc_secm(struct channel_subsystem *css, int enable) free_page((unsigned long)css->cub_addr1); free_page((unsigned long)css->cub_addr2); free_page((unsigned long)secm_area); - mutex_unlock(&css->mutex); return -ENOMEM; } } @@ -795,7 +793,6 @@ chsc_secm(struct channel_subsystem *css, int enable) free_page((unsigned long)css->cub_addr1); free_page((unsigned long)css->cub_addr2); } - mutex_unlock(&css->mutex); free_page((unsigned long)secm_area); return ret; } |