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authorMichael Ernst <mernst@de.ibm.com>2008-04-17 07:46:01 +0200
committerHeiko Carstens <heiko.carstens@de.ibm.com>2008-04-17 07:46:57 +0200
commit8284fb19efa1f11ea8dd213e9e227fc1fcb20586 (patch)
treef91933a4ee9e253bd25c3a98df0d67ee946bb41e /drivers/s390/cio/chsc.c
parentfe6173d9b33dba18ec462051750fb1b9abcd796d (diff)
downloadop-kernel-dev-8284fb19efa1f11ea8dd213e9e227fc1fcb20586.zip
op-kernel-dev-8284fb19efa1f11ea8dd213e9e227fc1fcb20586.tar.gz
[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.c3
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;
}
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