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| author | Heiner Kallweit <hkallweit1@gmail.com> | 2016-08-03 21:46:47 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-08-09 15:59:35 +0200 |
| commit | a094760b9a77f81ee3cbeff323ee77c928f41106 (patch) | |
| tree | bb56d7c711598923da6e73c24eb37640a7626681 | |
| parent | 833415a3e781a26fe480a34d45086bdb4fe1e4c0 (diff) | |
| download | linux-a094760b9a77f81ee3cbeff323ee77c928f41106.tar.bz2 | |
usb: storage: fix runtime pm issue in usb_stor_probe2
Since commit 71723f95463d "PM / runtime: print error when activating a
child to unactive parent" I see the following error message:
scsi host2: usb-storage 1-3:1.0
scsi host2: runtime PM trying to activate child device host2 but parent
(1-3:1.0) is not active
Digging into it it seems to be related to the problem described in the
commit message for cd998ded5c12 "i2c: designware: Prevent runtime
suspend during adapter registration" as scsi_add_host also calls
device_add and after the call to device_add the parent device is
suspended.
Fix this by using the approach from the mentioned commit and getting
the runtime pm reference before calling scsi_add_host.
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/usb/storage/usb.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/usb/storage/usb.c b/drivers/usb/storage/usb.c index ef2d8cde6ef7..8c5f0115166a 100644 --- a/drivers/usb/storage/usb.c +++ b/drivers/usb/storage/usb.c @@ -1070,17 +1070,17 @@ int usb_stor_probe2(struct us_data *us) result = usb_stor_acquire_resources(us); if (result) goto BadDevice; + usb_autopm_get_interface_no_resume(us->pusb_intf); snprintf(us->scsi_name, sizeof(us->scsi_name), "usb-storage %s", dev_name(&us->pusb_intf->dev)); result = scsi_add_host(us_to_host(us), dev); if (result) { dev_warn(dev, "Unable to add the scsi host\n"); - goto BadDevice; + goto HostAddErr; } /* Submit the delayed_work for SCSI-device scanning */ - usb_autopm_get_interface_no_resume(us->pusb_intf); set_bit(US_FLIDX_SCAN_PENDING, &us->dflags); if (delay_use > 0) @@ -1090,6 +1090,8 @@ int usb_stor_probe2(struct us_data *us) return 0; /* We come here if there are any problems */ +HostAddErr: + usb_autopm_put_interface_no_suspend(us->pusb_intf); BadDevice: usb_stor_dbg(us, "storage_probe() failed\n"); release_everything(us); |