hollalinux
/
linux-sg2042
mirror of https://github.com/sophgo/linux-riscv.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

Merge branch 'net-ipa-fix-cleanup-after-modem-crash' 

Alex Elder says:

====================
net: ipa: fix cleanup after modem crash

The first patch in this series fixes a bug where the size of a data
transfer request was never set, meaning it was 0.  The consequence
of this was that such a transfer request would never complete if
attempted, and led to a hung task timeout.

This data transfer is required for cleaning up IPA hardware state
when recovering from a modem crash.  The code to implement this
cleanup is already present, but its use was commented out because
it hit the bug described above.  So the second patch in this series
enables the use of that "tag process" cleanup code.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2020-05-11 14:00:44 -07:00
parent e8a1b0efd6 2c4bb8093c
commit 1abfb181e0
2 changed files with 6 additions and 13 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
drivers/net/ipa/gsi_trans.c
View File

@ -399,13 +399,14 @@ void gsi_trans_cmd_add(struct gsi_trans *trans, void *buf, u32 size,
/* assert(which < trans->tre_count); */
/* Set the page information for the buffer. We also need to fill in
* the DMA address for the buffer (something dma_map_sg() normally
* does).
* the DMA address and length for the buffer (something dma_map_sg()
* normally does).
*/
sg = &trans->sgl[which];
sg_set_buf(sg, buf, size);
sg_dma_address(sg) = addr;
sg_dma_len(sg) = sg->length;
info = &trans->info[which];
info->opcode = opcode;

14
drivers/net/ipa/ipa_cmd.c
View File

@ -628,23 +628,15 @@ static void ipa_cmd_transfer_add(struct gsi_trans *trans, u16 size)
void ipa_cmd_tag_process_add(struct gsi_trans *trans)
{
ipa_cmd_register_write_add(trans, 0, 0, 0, true);
#if 1
/* Reference these functions to avoid a compile error */
(void)ipa_cmd_ip_packet_init_add;
(void)ipa_cmd_ip_tag_status_add;
(void) ipa_cmd_transfer_add;
#else
struct ipa *ipa = container_of(trans->gsi, struct ipa, gsi);
struct gsi_endpoint *endpoint;
struct ipa_endpoint *endpoint;
endpoint = ipa->name_map[IPA_ENDPOINT_AP_LAN_RX];
ipa_cmd_register_write_add(trans, 0, 0, 0, true);
ipa_cmd_ip_packet_init_add(trans, endpoint->endpoint_id);
ipa_cmd_ip_tag_status_add(trans, 0xcba987654321);
ipa_cmd_transfer_add(trans, 4);
#endif
}
/* Returns the number of commands required for the tag process */