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| author | Eric Farman <farman@linux.ibm.com> | 2019-06-06 22:28:23 +0200 |
|---|---|---|
| committer | Cornelia Huck <cohuck@redhat.com> | 2019-06-17 13:28:29 +0200 |
| commit | 812271b91006e59407ea30ee72341d92b240f667 (patch) | |
| tree | a5231c790c0e2b661b3784294a1b02535e3ab889 /drivers | |
| parent | 39c00378e337c869b0c9cd35e108fc0c8671d644 (diff) | |
| download | linux-812271b91006e59407ea30ee72341d92b240f667.tar.gz linux-812271b91006e59407ea30ee72341d92b240f667.tar.bz2 linux-812271b91006e59407ea30ee72341d92b240f667.zip | |
s390/cio: Squash cp_free() and cp_unpin_free()
The routine cp_free() does nothing but call cp_unpin_free(), and while
most places call cp_free() there is one caller of cp_unpin_free() used
when the cp is guaranteed to have not been marked initialized.
This seems like a dubious way to make a distinction, so let's combine
these routines and make cp_free() do all the work.
Signed-off-by: Eric Farman <farman@linux.ibm.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Message-Id: <20190606202831.44135-2-farman@linux.ibm.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/s390/cio/vfio_ccw_cp.c | 36 |
1 files changed, 16 insertions, 20 deletions
diff --git a/drivers/s390/cio/vfio_ccw_cp.c b/drivers/s390/cio/vfio_ccw_cp.c index f73cfcfdd032..47cd7f94f42f 100644 --- a/drivers/s390/cio/vfio_ccw_cp.c +++ b/drivers/s390/cio/vfio_ccw_cp.c @@ -412,23 +412,6 @@ static void ccwchain_cda_free(struct ccwchain *chain, int idx) kfree((void *)(u64)ccw->cda); } -/* Unpin the pages then free the memory resources. */ -static void cp_unpin_free(struct channel_program *cp) -{ - struct ccwchain *chain, *temp; - int i; - - cp->initialized = false; - list_for_each_entry_safe(chain, temp, &cp->ccwchain_list, next) { - for (i = 0; i < chain->ch_len; i++) { - pfn_array_table_unpin_free(chain->ch_pat + i, - cp->mdev); - ccwchain_cda_free(chain, i); - } - ccwchain_free(chain); - } -} - /** * ccwchain_calc_length - calculate the length of the ccw chain. * @iova: guest physical address of the target ccw chain @@ -796,7 +779,7 @@ int cp_init(struct channel_program *cp, struct device *mdev, union orb *orb) /* Now loop for its TICs. */ ret = ccwchain_loop_tic(chain, cp); if (ret) - cp_unpin_free(cp); + cp_free(cp); /* It is safe to force: if not set but idals used * ccwchain_calc_length returns an error. */ @@ -819,8 +802,21 @@ int cp_init(struct channel_program *cp, struct device *mdev, union orb *orb) */ void cp_free(struct channel_program *cp) { - if (cp->initialized) - cp_unpin_free(cp); + struct ccwchain *chain, *temp; + int i; + + if (!cp->initialized) + return; + + cp->initialized = false; + list_for_each_entry_safe(chain, temp, &cp->ccwchain_list, next) { + for (i = 0; i < chain->ch_len; i++) { + pfn_array_table_unpin_free(chain->ch_pat + i, + cp->mdev); + ccwchain_cda_free(chain, i); + } + ccwchain_free(chain); + } } /** |