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| author | M. Mohan Kumar <mohan@in.ibm.com> | 2011-04-15 13:59:33 +0530 |
|---|---|---|
| committer | Eric Van Hensbergen <ericvh@strongbad.austin.rr.com> | 2011-05-09 22:51:12 -0500 |
| commit | 3cd7967825a2b3926dc96ae566d986c4420919f7 (patch) | |
| tree | fa8e4421ff3fada4da92bb8015ea3a5ce73a0e53 | |
| parent | 26822eebb25500fb0776c7c256a6af041e9f538b (diff) | |
| download | linux-stable-3cd7967825a2b3926dc96ae566d986c4420919f7.tar.gz linux-stable-3cd7967825a2b3926dc96ae566d986c4420919f7.tar.bz2 linux-stable-3cd7967825a2b3926dc96ae566d986c4420919f7.zip | |
net/9p: Handle get_user_pages_fast return properly
Use proper data type to handle get_user_pages_fast error condition. Also
do not treat EFAULT error as fatal.
Signed-off-by: M. Mohan Kumar <mohan@in.ibm.com>
Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
| -rw-r--r-- | net/9p/client.c | 2 | ||||
| -rw-r--r-- | net/9p/trans_common.c | 11 |
2 files changed, 4 insertions, 9 deletions
diff --git a/net/9p/client.c b/net/9p/client.c index 77367745be9b..a9aa2dd66482 100644 --- a/net/9p/client.c +++ b/net/9p/client.c @@ -614,7 +614,7 @@ p9_client_rpc(struct p9_client *c, int8_t type, const char *fmt, ...) err = c->trans_mod->request(c, req); if (err < 0) { - if (err != -ERESTARTSYS) + if (err != -ERESTARTSYS && err != -EFAULT) c->status = Disconnected; goto reterr; } diff --git a/net/9p/trans_common.c b/net/9p/trans_common.c index e883172f9aa2..9a70ebdec56e 100644 --- a/net/9p/trans_common.c +++ b/net/9p/trans_common.c @@ -63,7 +63,7 @@ p9_payload_gup(struct p9_req_t *req, size_t *pdata_off, int *pdata_len, int nr_pages, u8 rw) { uint32_t first_page_bytes = 0; - uint32_t pdata_mapped_pages; + int32_t pdata_mapped_pages; struct trans_rpage_info *rpinfo; *pdata_off = (__force size_t)req->tc->pubuf & (PAGE_SIZE-1); @@ -75,14 +75,9 @@ p9_payload_gup(struct p9_req_t *req, size_t *pdata_off, int *pdata_len, rpinfo = req->tc->private; pdata_mapped_pages = get_user_pages_fast((unsigned long)req->tc->pubuf, nr_pages, rw, &rpinfo->rp_data[0]); + if (pdata_mapped_pages <= 0) + return pdata_mapped_pages; - if (pdata_mapped_pages < 0) { - printk(KERN_ERR "get_user_pages_fast failed:%d udata:%p" - "nr_pages:%d\n", pdata_mapped_pages, - req->tc->pubuf, nr_pages); - pdata_mapped_pages = 0; - return -EIO; - } rpinfo->rp_nr_pages = pdata_mapped_pages; if (*pdata_off) { *pdata_len = first_page_bytes; |