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authorFinn Thain <fthain@telegraphics.com.au>2020-06-28 14:23:12 +1000
committerMichael Ellerman <mpe@ellerman.id.au>2020-07-26 23:34:24 +1000
commit59ea38f6b3af5636edf541768a1ed721eeaca99e (patch)
treeb0eedeae83591bd715316fd64ae2712e9b7d9ad1 /drivers/macintosh
parentc66da95a39ec2bb95544c3def974d96e8c178f57 (diff)
downloadlwn-59ea38f6b3af5636edf541768a1ed721eeaca99e.tar.gz
lwn-59ea38f6b3af5636edf541768a1ed721eeaca99e.zip
macintosh/via-macii: Access autopoll_devs when inside lock
The interrupt handler should be excluded when accessing the autopoll_devs variable. Fixes: d95fd5fce88f0 ("m68k: Mac II ADB fixes") # v5.0+ Signed-off-by: Finn Thain <fthain@telegraphics.com.au> Tested-by: Stan Johnson <userm57@yahoo.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/5952dd8a9bc9de90f1acc4790c51dd42b4c98065.1593318192.git.fthain@telegraphics.com.au
Diffstat (limited to 'drivers/macintosh')
-rw-r--r--drivers/macintosh/via-macii.c9
1 files changed, 3 insertions, 6 deletions
diff --git a/drivers/macintosh/via-macii.c b/drivers/macintosh/via-macii.c
index ac824d7b2dcf..6aa903529570 100644
--- a/drivers/macintosh/via-macii.c
+++ b/drivers/macintosh/via-macii.c
@@ -270,15 +270,12 @@ static int macii_autopoll(int devs)
unsigned long flags;
int err = 0;
+ local_irq_save(flags);
+
/* bit 1 == device 1, and so on. */
autopoll_devs = devs & 0xFFFE;
- if (!autopoll_devs)
- return 0;
-
- local_irq_save(flags);
-
- if (current_req == NULL) {
+ if (autopoll_devs && !current_req) {
/* Send a Talk Reg 0. The controller will repeatedly transmit
* this as long as it is idle.
*/