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| author | Finn Thain <fthain@telegraphics.com.au> | 2018-09-11 20:18:44 -0400 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2018-10-08 22:53:10 +1100 |
| commit | 2341629eadc4a40aa46103c7f1ff5f38459688d3 (patch) | |
| tree | 7ef371c2b3b07b075d3225006403444feebaec17 /drivers/macintosh/adb.c | |
| parent | 0792a2c8e0bbda3605b8d42c6b9635be7b19982a (diff) | |
| download | linux-2341629eadc4a40aa46103c7f1ff5f38459688d3.tar.bz2 | |
macintosh/adb: Rework printk output again
Avoid the KERN_CONT problem by avoiding message fragments. The problem
arises during async ADB bus probing, when ADB messages may get mixed up
with other messages. See also, commit 4bcc595ccd80 ("printk: reinstate
KERN_CONT for printing continuation lines").
Remove a number of printk() continuation lines by logging handler
changes in adb_try_handler_change() instead.
This patch addresses the problematic use of "\n" at the beginning of
pr_cont() messages, which got overlooked in commit f2be6295684b
("macintosh/adb: Properly mark continued kernel messages").
That commit also changed printk(KERN_DEBUG ...) to pr_debug(...), which
hinders work on low-level ADB driver bugs. Revert that change.
Cc: Andreas Schwab <schwab@linux-m68k.org>
Tested-by: Stan Johnson <userm57@yahoo.com>
Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'drivers/macintosh/adb.c')
| -rw-r--r-- | drivers/macintosh/adb.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/drivers/macintosh/adb.c b/drivers/macintosh/adb.c index 76e98f0f7a3e..e49d1f287a17 100644 --- a/drivers/macintosh/adb.c +++ b/drivers/macintosh/adb.c @@ -203,15 +203,15 @@ static int adb_scan_bus(void) } /* Now fill in the handler_id field of the adb_handler entries. */ - pr_debug("adb devices:\n"); for (i = 1; i < 16; i++) { if (adb_handler[i].original_address == 0) continue; adb_request(&req, NULL, ADBREQ_SYNC | ADBREQ_REPLY, 1, (i << 4) | 0xf); adb_handler[i].handler_id = req.reply[2]; - pr_debug(" [%d]: %d %x\n", i, adb_handler[i].original_address, - adb_handler[i].handler_id); + printk(KERN_DEBUG "adb device [%d]: %d 0x%X\n", i, + adb_handler[i].original_address, + adb_handler[i].handler_id); devmask |= 1 << i; } return devmask; @@ -579,6 +579,8 @@ adb_try_handler_change(int address, int new_id) mutex_lock(&adb_handler_mutex); ret = try_handler_change(address, new_id); mutex_unlock(&adb_handler_mutex); + if (ret) + pr_debug("adb handler change: [%d] 0x%X\n", address, new_id); return ret; } EXPORT_SYMBOL(adb_try_handler_change); |