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| author | Mika Westerberg <mika.westerberg@linux.intel.com> | 2020-02-14 18:25:34 +0100 |
|---|---|---|
| committer | Mika Westerberg <mika.westerberg@linux.intel.com> | 2020-06-22 18:58:32 +0200 |
| commit | 6bfe33473eaac9443dfce129b3107cc27abc1e47 (patch) | |
| tree | 5024daf0cbbe0851addcb22568f2885afed5f392 /drivers/thunderbolt/usb4.c | |
| parent | thunderbolt: Generalize usb4_switch_do_[read|write]_data() (diff) | |
| download | linux-6bfe33473eaac9443dfce129b3107cc27abc1e47.tar.xz linux-6bfe33473eaac9443dfce129b3107cc27abc1e47.zip | |
thunderbolt: Retry USB4 block read operation
Especially when accessing retimers over USB4 sideband operations the
possibility to get read errors seems to be higher so make the
usb4_do_read_data() retry a couple of times if it sees any other error
than -ENODEV (device is gone). We can only do this for read side because
it carries the offset as part of metadata (as opposed to writes).
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Diffstat (limited to 'drivers/thunderbolt/usb4.c')
| -rw-r--r-- | drivers/thunderbolt/usb4.c | 7 |
1 files changed, 2 insertions, 5 deletions
diff --git a/drivers/thunderbolt/usb4.c b/drivers/thunderbolt/usb4.c index 8a83857573df..142c7244bdb1 100644 --- a/drivers/thunderbolt/usb4.c +++ b/drivers/thunderbolt/usb4.c @@ -115,11 +115,8 @@ static int usb4_do_read_data(u16 address, void *buf, size_t size, ret = read_block(read_block_data, dwaddress, data, dwords); if (ret) { - if (ret == -ETIMEDOUT) { - if (retries--) - continue; - ret = -EIO; - } + if (ret != -ENODEV && retries--) + continue; return ret; } |