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| author | Matthew Gerlach <matthew.gerlach@linux.intel.com> | 2020-07-13 14:10:03 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-07-29 10:18:31 +0200 |
| commit | 570b1c92cb48864bd656ea1aab481fe44989b661 (patch) | |
| tree | 567c1792eec6575901775b8ece77c60d9eca9b5a /drivers/fpga | |
| parent | c73188295841a90cb8d401f91679001987822248 (diff) | |
| download | linux-stable-570b1c92cb48864bd656ea1aab481fe44989b661.tar.gz linux-stable-570b1c92cb48864bd656ea1aab481fe44989b661.tar.bz2 linux-stable-570b1c92cb48864bd656ea1aab481fe44989b661.zip | |
fpga: dfl: fix bug in port reset handshake
[ Upstream commit 8614afd689df59d9ce019439389be20bd788a897 ]
When putting the port in reset, driver must wait for the soft reset
acknowledgment bit instead of the soft reset bit.
Fixes: 47c1b19c160f (fpga: dfl: afu: add port ops support)
Signed-off-by: Matthew Gerlach <matthew.gerlach@linux.intel.com>
Signed-off-by: Xu Yilun <yilun.xu@intel.com>
Acked-by: Wu Hao <hao.wu@intel.com>
Reviewed-by: Tom Rix <trix@redhat.com>
Signed-off-by: Moritz Fischer <mdf@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/fpga')
| -rw-r--r-- | drivers/fpga/dfl-afu-main.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/fpga/dfl-afu-main.c b/drivers/fpga/dfl-afu-main.c index e4a34dc7947f..041d23469238 100644 --- a/drivers/fpga/dfl-afu-main.c +++ b/drivers/fpga/dfl-afu-main.c @@ -83,7 +83,8 @@ int __afu_port_disable(struct platform_device *pdev) * on this port and minimum soft reset pulse width has elapsed. * Driver polls port_soft_reset_ack to determine if reset done by HW. */ - if (readq_poll_timeout(base + PORT_HDR_CTRL, v, v & PORT_CTRL_SFTRST, + if (readq_poll_timeout(base + PORT_HDR_CTRL, v, + v & PORT_CTRL_SFTRST_ACK, RST_POLL_INVL, RST_POLL_TIMEOUT)) { dev_err(&pdev->dev, "timeout, fail to reset device\n"); return -ETIMEDOUT; |