linux-kernel - [PATCH] Revert "usb: dwc2: host: Setting qtd to NULL after freeing it"

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Date:   Wed, 29 May 2019 13:54:43 -0700
From:   Guenter Roeck <linux@...ck-us.net>
To:     Minas Harutyunyan <hminas@...opsys.com>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
        Guenter Roeck <linux@...ck-us.net>,
        Vardan Mikayelyan <mvardan@...opsys.com>,
        John Youn <johnyoun@...opsys.com>,
        Douglas Anderson <dianders@...omiun.org>,
        Felipe Balbi <felipe.balbi@...ux.intel.com>
Subject: [PATCH] Revert "usb: dwc2: host: Setting qtd to NULL after freeing it"

This reverts commit b0d659022e5c96ee5c4bd62d22d3da2d66de306b.

The reverted commit does nothing but adding two unnecessary lines
of code.  It sets a local variable to NULL in two functions, but
that variable is not used anywhere in the rest of those functions.
This is just confusing, so let's remove it.

Cc: Vardan Mikayelyan <mvardan@...opsys.com>
Cc: John Youn <johnyoun@...opsys.com>
Cc: Douglas Anderson <dianders@...omiun.org>
Cc: Felipe Balbi <felipe.balbi@...ux.intel.com>
Signed-off-by: Guenter Roeck <linux@...ck-us.net>
---
 drivers/usb/dwc2/hcd.c | 1 -
 drivers/usb/dwc2/hcd.h | 1 -
 2 files changed, 2 deletions(-)

diff --git a/drivers/usb/dwc2/hcd.c b/drivers/usb/dwc2/hcd.c
index b50ec3714fd8..bca64b0d4d15 100644
--- a/drivers/usb/dwc2/hcd.c
+++ b/drivers/usb/dwc2/hcd.c
@@ -4676,7 +4676,6 @@ static int _dwc2_hcd_urb_enqueue(struct usb_hcd *hcd, struct urb *urb,
 	spin_unlock_irqrestore(&hsotg->lock, flags);
 	urb->hcpriv = NULL;
 	kfree(qtd);
-	qtd = NULL;
 fail1:
 	if (qh_allocated) {
 		struct dwc2_qtd *qtd2, *qtd2_tmp;
diff --git a/drivers/usb/dwc2/hcd.h b/drivers/usb/dwc2/hcd.h
index c089ffa1f0a8..f6bc48432b04 100644
--- a/drivers/usb/dwc2/hcd.h
+++ b/drivers/usb/dwc2/hcd.h
@@ -574,7 +574,6 @@ static inline void dwc2_hcd_qtd_unlink_and_free(struct dwc2_hsotg *hsotg,
 {
 	list_del(&qtd->qtd_list_entry);
 	kfree(qtd);
-	qtd = NULL;
 }
 
 /* Descriptor DMA support functions */
-- 
2.7.4