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| author |   Cyril Bur <cyrilbur@gmail.com> | 2017-11-03 13:41:38 +1100 |
|---|---|---|
| committer |   Michael Ellerman <mpe@ellerman.id.au> | 2017-11-06 20:20:26 +1100 |
| commit | 25ee52e66949b6e5f041aedff4db9a7d84a6fb2b (patch) | |
| tree | 40703bc32546880bd5ff70fb2cd392abd47c73e7 /drivers/mtd/devices | |
| parent | mtd: powernv_flash: Use WARN_ON_ONCE() rather than BUG_ON() (diff) | |
| download | linux-dev-25ee52e66949b6e5f041aedff4db9a7d84a6fb2b.tar.xz linux-dev-25ee52e66949b6e5f041aedff4db9a7d84a6fb2b.zip | |
mtd: powernv_flash: Don't treat OPAL_SUCCESS as an error
While this driver expects to interact asynchronously, OPAL is well
within its rights to return OPAL_SUCCESS to indicate that the operation
completed without the need for a callback. We shouldn't treat
OPAL_SUCCESS as an error rather we should wrap up and return promptly to
the caller.
Signed-off-by: Cyril Bur <cyrilbur@gmail.com>
Acked-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'drivers/mtd/devices')
| -rw-r--r-- | drivers/mtd/devices/powernv_flash.c | 15 |
1 files changed, 10 insertions, 5 deletions
diff --git a/drivers/mtd/devices/powernv_flash.c b/drivers/mtd/devices/powernv_flash.c index f9ec38281ff2..ca3ca6adf71e 100644 --- a/drivers/mtd/devices/powernv_flash.c +++ b/drivers/mtd/devices/powernv_flash.c @@ -63,7 +63,6 @@ static int powernv_flash_async_op(struct mtd_info *mtd, enum flash_op op, if (token < 0) { if (token != -ERESTARTSYS) dev_err(dev, "Failed to get an async token\n"); - return token; } @@ -83,21 +82,25 @@ static int powernv_flash_async_op(struct mtd_info *mtd, enum flash_op op, return -EIO; } + if (rc == OPAL_SUCCESS) + goto out_success; + if (rc != OPAL_ASYNC_COMPLETION) { dev_err(dev, "opal_flash_async_op(op=%d) failed (rc %d)\n", op, rc); - opal_async_release_token(token); - return -EIO; + rc = -EIO; + goto out; } rc = opal_async_wait_response(token, &msg); - opal_async_release_token(token); if (rc) { dev_err(dev, "opal async wait failed (rc %d)\n", rc); - return -EIO; + rc = -EIO; + goto out; } rc = opal_get_async_rc(msg); +out_success: if (rc == OPAL_SUCCESS) { rc = 0; if (retlen) @@ -106,6 +109,8 @@ static int powernv_flash_async_op(struct mtd_info *mtd, enum flash_op op, rc = -EIO; } +out: + opal_async_release_token(token); return rc; } |