4.14-stable review patch. If anyone has any objections, please let me know.
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From: Jakub Kicinski jakub.kicinski@netronome.com
[ Upstream commit 5496295aefe86995e41398b0f76de601308fc3f5 ]
We currently allow signals to interrupt the wait for management FW commands. Exiting the wait should not cause trouble, the FW will just finish executing the command in the background and new commands will wait for the old one to finish.
However, this may not be what users expect (Ctrl-C not actually stopping the command). Moreover some systems routinely request link information with signals pending (Ubuntu 14.04 runs a landscape-sysinfo python tool from MOTD) worrying users with errors like these:
nfp 0000:04:00.0: nfp_nsp: Error -512 waiting for code 0x0007 to start nfp 0000:04:00.0: nfp: reading port table failed -512
Make the wait for management FW responses non-interruptible.
Fixes: 1a64821c6af7 ("nfp: add support for service processor access") Signed-off-by: Jakub Kicinski jakub.kicinski@netronome.com Reviewed-by: Dirk van der Merwe dirk.vandermerwe@netronome.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Sasha Levin alexander.levin@microsoft.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/net/ethernet/netronome/nfp/nfpcore/nfp_nsp.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-)
--- a/drivers/net/ethernet/netronome/nfp/nfpcore/nfp_nsp.c +++ b/drivers/net/ethernet/netronome/nfp/nfpcore/nfp_nsp.c @@ -277,8 +277,7 @@ nfp_nsp_wait_reg(struct nfp_cpp *cpp, u6 if ((*reg & mask) == val) return 0;
- if (msleep_interruptible(25)) - return -ERESTARTSYS; + msleep(25);
if (time_after(start_time, wait_until)) return -ETIMEDOUT;