From: "Pali Rohár" <pali@kernel.org>
To: linux-pci@vger.kernel.org, bcm-kernel-feedback-list@broadcom.com
Subject: pcie-iproc-msi.c: Bug in Multi-MSI support?
Date: Thu, 20 May 2021 14:00:55 +0200 [thread overview]
Message-ID: <20210520120055.jl7vkqanv7wzeipq@pali> (raw)
Hello!
I think there is a bug in pcie-iproc-msi.c driver. It declares
Multi MSI support via MSI_FLAG_MULTI_PCI_MSI flag, see:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/pci/controller/pcie-iproc-msi.c?h=v5.12#n174
but its iproc_msi_irq_domain_alloc() function completely ignores nr_irqs
argument when allocating interrupt numbers from bitmap, see:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/pci/controller/pcie-iproc-msi.c?h=v5.12#n246
I think this this is incorrect as alloc callback should allocate nr_irqs
multi interrupts as caller requested. All other drivers with Multi MSI
support are doing it.
Could you look at it?
next reply other threads:[~2021-05-20 12:01 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-20 12:00 Pali Rohár [this message]
2021-05-20 13:47 ` pcie-iproc-msi.c: Bug in Multi-MSI support? Sandor Bodo-Merle
2021-05-20 14:05 ` Pali Rohár
2021-05-20 14:22 ` Sandor Bodo-Merle
2021-05-20 17:11 ` Ray Jui
2021-05-20 19:31 ` Sandor Bodo-Merle
2021-05-21 11:39 ` Sandor Bodo-Merle
2021-05-21 14:00 ` Sandor Bodo-Merle
2021-05-24 10:37 ` Marc Zyngier
2021-05-25 17:27 ` Ray Jui
2021-05-25 17:35 ` Pali Rohár
2021-05-25 17:39 ` Ray Jui
2021-05-26 7:57 ` Marc Zyngier
2021-05-26 16:10 ` Sandor Bodo-Merle
2021-06-02 8:34 ` Marc Zyngier
2021-06-03 16:59 ` Ray Jui
2021-06-04 9:17 ` Sandor Bodo-Merle
2021-06-04 16:47 ` Ray Jui
2021-05-26 17:34 ` Ray Jui
2021-05-26 20:18 ` Sandor Bodo-Merle
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20210520120055.jl7vkqanv7wzeipq@pali \
--to=pali@kernel.org \
--cc=bcm-kernel-feedback-list@broadcom.com \
--cc=linux-pci@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).