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authorQiaoChong <qiaochong@loongson.cn>2019-02-09 20:59:07 +0000
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2019-02-11 09:39:02 +0100
commit21698fd57984cd28207d841dbdaa026d6061bceb (patch)
tree668a40a887f0d9331074551545bb9026f3775e16 /drivers/parport
parent492b7a888860b2d06065f0c1dc9587736909ba85 (diff)
downloadlinux-21698fd57984cd28207d841dbdaa026d6061bceb.tar.gz
parport_pc: fix find_superio io compare code, should use equal test.
In the original code before 181bf1e815a2 the loop was continuing until it finds the first matching superios[i].io and p->base. But after 181bf1e815a2 the logic changed and the loop now returns the pointer to the first mismatched array element which is then used in get_superio_dma() and get_superio_irq() and thus returning the wrong value. Fix the condition so that it now returns the correct pointer. Fixes: 181bf1e815a2 ("parport_pc: clean up the modified while loops using for") Cc: Alan Cox <alan@linux.intel.com> Cc: stable@vger.kernel.org Signed-off-by: QiaoChong <qiaochong@loongson.cn> [rewrite the commit message] Signed-off-by: Sudip Mukherjee <sudipm.mukherjee@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/parport')
-rw-r--r--drivers/parport/parport_pc.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/parport/parport_pc.c b/drivers/parport/parport_pc.c
index 9c8249f74479..6296dbb83d47 100644
--- a/drivers/parport/parport_pc.c
+++ b/drivers/parport/parport_pc.c
@@ -1377,7 +1377,7 @@ static struct superio_struct *find_superio(struct parport *p)
{
int i;
for (i = 0; i < NR_SUPERIOS; i++)
- if (superios[i].io != p->base)
+ if (superios[i].io == p->base)
return &superios[i];
return NULL;
}