From 3cd7967825a2b3926dc96ae566d986c4420919f7 Mon Sep 17 00:00:00 2001 From: "M. Mohan Kumar" Date: Fri, 15 Apr 2011 13:59:33 +0530 Subject: [PATCH] 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 Signed-off-by: Venkateswararao Jujjuri Signed-off-by: Eric Van Hensbergen --- net/9p/client.c | 2 +- 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; -- 2.30.2