lkml.org 
[lkml]   [2022]   [Dec]   [12]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
SubjectRe: [EXT] [PATCH] octeontx2-af: cn10k: mcs: Fix a resource leak in the probe and remove functions
Date
Ack.
Thanks for the patch.

Geetha.

________________________________________
From: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Sent: Saturday, December 10, 2022 11:05 PM
To: Sunil Kovvuri Goutham; Linu Cherian; Geethasowjanya Akula; Jerin Jacob Kollanukkaran; Hariprasad Kelam; Subbaraya Sundeep Bhatta; David S. Miller; Eric Dumazet; Jakub Kicinski; Paolo Abeni; Vamsi Krishna Attunuru
Cc: linux-kernel@vger.kernel.org; kernel-janitors@vger.kernel.org; Christophe JAILLET; netdev@vger.kernel.org
Subject: [EXT] [PATCH] octeontx2-af: cn10k: mcs: Fix a resource leak in the probe and remove functions

External Email

----------------------------------------------------------------------
In mcs_register_interrupts(), a call to request_irq() is not balanced by a
corresponding free_irq(), neither in the error handling path, nor in the
remove function.

Add the missing calls.

Fixes: 6c635f78c474 ("octeontx2-af: cn10k: mcs: Handle MCS block interrupts")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
---
This patch is untested and speculative.
I'm always reluctant to send patches around irq management, because it is
sometimes tricky.
Review with care!

Maybe introducing a mcs_unregister_interrupts() function would be cleaner
and more future proof.
---
drivers/net/ethernet/marvell/octeontx2/af/mcs.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/marvell/octeontx2/af/mcs.c b/drivers/net/ethernet/marvell/octeontx2/af/mcs.c
index c0bedf402da9..f68a6a0e3aa4 100644
--- a/drivers/net/ethernet/marvell/octeontx2/af/mcs.c
+++ b/drivers/net/ethernet/marvell/octeontx2/af/mcs.c
@@ -1184,10 +1184,13 @@ static int mcs_register_interrupts(struct mcs *mcs)
mcs->tx_sa_active = alloc_mem(mcs, mcs->hw->sc_entries);
if (!mcs->tx_sa_active) {
ret = -ENOMEM;
- goto exit;
+ goto free_irq;
}

return ret;
+
+free_irq:
+ free_irq(pci_irq_vector(mcs->pdev, MCS_INT_VEC_IP), mcs);
exit:
pci_free_irq_vectors(mcs->pdev);
mcs->num_vec = 0;
@@ -1589,6 +1592,7 @@ static void mcs_remove(struct pci_dev *pdev)

/* Set MCS to external bypass */
mcs_set_external_bypass(mcs, true);
+ free_irq(pci_irq_vector(pdev, MCS_INT_VEC_IP), mcs);
pci_free_irq_vectors(pdev);
pci_release_regions(pdev);
pci_disable_device(pdev);
--
2.34.1
\
 
 \ /
  Last update: 2022-12-12 07:48    [W:0.052 / U:0.372 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site