From: Dan Williams Date: Fri, 6 Apr 2012 18:49:50 +0000 (-0700) Subject: serial/8250_pci: add a "force background timer" flag and use it for the "kt" serial... X-Git-Tag: v3.4-rc3~24^2~2 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=bc02d15a3452fdf9276e8fb89c5e504a88df888a;p=pandora-kernel.git serial/8250_pci: add a "force background timer" flag and use it for the "kt" serial port Workaround dropped notifications in the iir register. Register reads coincident with new interrupt notifications sometimes result in this device clearing the interrupt event without reporting it in the read data. The serial core already has a heuristic for determining when a device has an untrustworthy iir register. In this case when we apriori know that the iir is faulty use a flag (UPF_BUG_THRE) to bypass the test and force usage of the background timer. [stable: 3.3.x] Acked-by: Alan Cox Cc: stable Reported-by: Nhan H Mai Reported-by: Sudhakar Mamillapalli Tested-by: Nhan H Mai Tested-by: Sudhakar Mamillapalli Signed-off-by: Dan Williams Signed-off-by: Greg Kroah-Hartman --- Reading git-diff-tree failed