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authorAlan Cox <alan@linux.intel.com>2014-12-10 18:06:40 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2015-01-12 16:04:12 +0300
commit8402641b2dc73748dde81e3513ac61c8436be3cb (patch)
tree1b07dd8997e0e5c9091da5f877676213cb494810 /drivers/pcmcia
parentb38a4bd319e615b4eb4be9d8c0d5ddc13113c768 (diff)
downloadlinux-8402641b2dc73748dde81e3513ac61c8436be3cb.tar.xz
pcmcia: Fix requery
The requery logic goes off and attempts to read the CIS of empty slots. In most cases this happens not to do any harm - but not all! Add the missing check and also a WARN() to catch any other offenders. Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/pcmcia')
-rw-r--r--drivers/pcmcia/cistpl.c2
-rw-r--r--drivers/pcmcia/ds.c3
2 files changed, 4 insertions, 1 deletions
diff --git a/drivers/pcmcia/cistpl.c b/drivers/pcmcia/cistpl.c
index 4ff725ca2c74..8b3b49217287 100644
--- a/drivers/pcmcia/cistpl.c
+++ b/drivers/pcmcia/cistpl.c
@@ -1386,7 +1386,7 @@ int pccard_validate_cis(struct pcmcia_socket *s, unsigned int *info)
if (!s)
return -EINVAL;
- if (s->functions) {
+ if (s->functions || !(s->state & SOCKET_PRESENT)) {
WARN_ON(1);
return -EINVAL;
}
diff --git a/drivers/pcmcia/ds.c b/drivers/pcmcia/ds.c
index 757119b87146..d3baf0bfca9f 100644
--- a/drivers/pcmcia/ds.c
+++ b/drivers/pcmcia/ds.c
@@ -667,6 +667,9 @@ static void pcmcia_requery(struct pcmcia_socket *s)
{
int has_pfc;
+ if (!(s->state & SOCKET_PRESENT))
+ return;
+
if (s->functions == 0) {
pcmcia_card_add(s);
return;