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| author | Sebastian Ott <sebott@linux.vnet.ibm.com> | 2016-01-25 12:30:27 +0300 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2016-01-26 14:47:23 +0300 |
| commit | 0d9bfe9123cfde59bf5c2e375b59d2a7d5061c4c (patch) | |
| tree | dabfd7b8bd41bfd5b75fd332aafb03122fa0df78 /drivers/s390/cio/chsc.c | |
| parent | d8f51227f33fbb34e1e54e315175268f54e573e7 (diff) | |
| download | linux-0d9bfe9123cfde59bf5c2e375b59d2a7d5061c4c.tar.xz | |
s390/cio: fix measurement characteristics memleak
Measurement characteristics are allocated during channel path
registration but not freed during deregistration. Fix this by
embedding these characteristics inside struct channel_path.
Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Reviewed-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'drivers/s390/cio/chsc.c')
| -rw-r--r-- | drivers/s390/cio/chsc.c | 16 |
1 files changed, 2 insertions, 14 deletions
diff --git a/drivers/s390/cio/chsc.c b/drivers/s390/cio/chsc.c index a831d18596a5..5df0efee54db 100644 --- a/drivers/s390/cio/chsc.c +++ b/drivers/s390/cio/chsc.c @@ -967,22 +967,19 @@ static void chsc_initialize_cmg_chars(struct channel_path *chp, u8 cmcv, struct cmg_chars *chars) { - struct cmg_chars *cmg_chars; int i, mask; - cmg_chars = chp->cmg_chars; for (i = 0; i < NR_MEASUREMENT_CHARS; i++) { mask = 0x80 >> (i + 3); if (cmcv & mask) - cmg_chars->values[i] = chars->values[i]; + chp->cmg_chars.values[i] = chars->values[i]; else - cmg_chars->values[i] = 0; + chp->cmg_chars.values[i] = 0; } } int chsc_get_channel_measurement_chars(struct channel_path *chp) { - struct cmg_chars *cmg_chars; int ccode, ret; struct { @@ -1006,11 +1003,6 @@ int chsc_get_channel_measurement_chars(struct channel_path *chp) u32 data[NR_MEASUREMENT_CHARS]; } __attribute__ ((packed)) *scmc_area; - chp->cmg_chars = NULL; - cmg_chars = kmalloc(sizeof(*cmg_chars), GFP_KERNEL); - if (!cmg_chars) - return -ENOMEM; - spin_lock_irq(&chsc_page_lock); memset(chsc_page, 0, PAGE_SIZE); scmc_area = chsc_page; @@ -1042,14 +1034,10 @@ int chsc_get_channel_measurement_chars(struct channel_path *chp) /* No cmg-dependent data. */ goto out; } - chp->cmg_chars = cmg_chars; chsc_initialize_cmg_chars(chp, scmc_area->cmcv, (struct cmg_chars *) &scmc_area->data); out: spin_unlock_irq(&chsc_page_lock); - if (!chp->cmg_chars) - kfree(cmg_chars); - return ret; } |