5.4-stable review patch. If anyone has any objections, please let me know.
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From: Sergey Shtylyov s.shtylyov@omp.ru
commit d4a89339f17c87c4990070e9116462d16e75894f upstream.
Commit defc9cd826e4 ("pata_legacy: resychronize with upstream changes and resubmit") missed to update legacy_exit(), so that it now fails to do any cleanup -- the loop body there can never be entered. Fix that and finally remove now useless nr_legacy_host variable...
Found by Linux Verification Center (linuxtesting.org) with the Svace static analysis tool.
Fixes: defc9cd826e4 ("pata_legacy: resychronize with upstream changes and resubmit") Cc: stable@vger.kernel.org Signed-off-by: Sergey Shtylyov s.shtylyov@omp.ru Reviewed-by: Niklas Cassel cassel@kernel.org Signed-off-by: Damien Le Moal dlemoal@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/ata/pata_legacy.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-)
--- a/drivers/ata/pata_legacy.c +++ b/drivers/ata/pata_legacy.c @@ -114,8 +114,6 @@ static int legacy_port[NR_HOST] = { 0x1f static struct legacy_probe probe_list[NR_HOST]; static struct legacy_data legacy_data[NR_HOST]; static struct ata_host *legacy_host[NR_HOST]; -static int nr_legacy_host; -
static int probe_all; /* Set to check all ISA port ranges */ static int ht6560a; /* HT 6560A on primary 1, second 2, both 3 */ @@ -1239,9 +1237,11 @@ static __exit void legacy_exit(void) { int i;
- for (i = 0; i < nr_legacy_host; i++) { + for (i = 0; i < NR_HOST; i++) { struct legacy_data *ld = &legacy_data[i]; - ata_host_detach(legacy_host[i]); + + if (legacy_host[i]) + ata_host_detach(legacy_host[i]); platform_device_unregister(ld->platform_dev); } }