linux-kernel - [BUG] ntb: Sleep in interrupt handling

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Date:   Thu, 01 Jun 2017 17:17:56 +0800
From:   Jia-Ju Bai <baijiaju1990@....com>
To:     jdmason@...zu.us, dave.jiang@...el.com, Allen.Hubbe@....com
CC:     linux-ntb@...glegroups.com, LKML <linux-kernel@...r.kernel.org>
Subject: [BUG] ntb: Sleep in interrupt handling

According to ntb_transport.c, the driver may sleep in interrupt handling.
The function call path is:
ntb_transport_rxc_db (tasklet_init indicates it handles interrupt)
   ntb_process_rxc
     ntb_async_rx
       ntb_async_rx_submit
         schedule_timeout --> may sleep

This bug is found by my static analysis tool and my code review.
I hope to fix it, but I do not have a good solution.

Thanks,
Jia-Ju Bai