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| author | Ian Jackson <ian.jackson@eu.citrix.com> | 2009-11-18 11:08:11 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2009-12-12 00:18:05 +0100 |
| commit | 68cb4f8e246bbbc649980be0628cae9265870a91 (patch) | |
| tree | ac21578ae76e640af2584726a80c20673f25ef1a /fs/devpts | |
| parent | tty: docs: serial/tty, add to ldisc methods (diff) | |
| download | linux-68cb4f8e246bbbc649980be0628cae9265870a91.tar.xz linux-68cb4f8e246bbbc649980be0628cae9265870a91.zip | |
Serial: Do not read IIR in serial8250_start_tx when UART_BUG_TXEN
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>
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'fs/devpts')
0 files changed, 0 insertions, 0 deletions