| commit | 77e856d7f3de1bfb26f96314ed6e868fe4f38877 | |
| author | Ian Jackson <ian.jackson@eu.citrix.com> | |
| Wed, 18 Nov 2009 10:08:11 +0000 (18 11:08 +0100) | ||
| committer | Greg Kroah-Hartman <gregkh@suse.de> | |
| Fri, 18 Dec 2009 21:43:48 +0000 (18 13:43 -0800) | ||
| tree | 80f79b5e08954fb392defe70d86c1fba91ef3a0d | treesnapshot (tar.gz zip) |
| parent | 7c52c4436288e1eec78edaca6366658b33fb54e2 | commitdiff |
Serial: Do not read IIR in serial8250_start_tx when UART_BUG_TXEN
commit 68cb4f8e246bbbc649980be0628cae9265870a91 upstream.
Do not read IIR in serial8250_start_tx when UART_BUG_TXEN
Reading the IIR clears some oustanding interrupts so it is not safe.
Instead, simply transmit immediately if the buffer is empty without
regard to IIR.
Signed-off-by: Ian Jackson <ian.jackson@eu.citrix.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Jiri Kosina <jkosina@suse.cz>
Cc: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
commit 68cb4f8e246bbbc649980be0628cae9265870a91 upstream.
Do not read IIR in serial8250_start_tx when UART_BUG_TXEN
Reading the IIR clears some oustanding interrupts so it is not safe.
Instead, simply transmit immediately if the buffer is empty without
regard to IIR.
Signed-off-by: Ian Jackson <ian.jackson@eu.citrix.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Jiri Kosina <jkosina@suse.cz>
Cc: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| drivers/serial/8250.c | diffblobblamehistory |