Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 3cd79678 authored by M. Mohan Kumar's avatar M. Mohan Kumar Committed by Eric Van Hensbergen
Browse files

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: default avatarM. Mohan Kumar <mohan@in.ibm.com>
Signed-off-by: default avatarVenkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
Signed-off-by: default avatarEric Van Hensbergen <ericvh@gmail.com>
parent 26822eeb

net/9p/client.c

+1 −1
Original line number Diff line number Diff line
@@ -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;

	}

net/9p/trans_common.c

+3 −8
Original line number Diff line number Diff line
@@ -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;