linux-kernel - Re: [PATCH] drm/qxl: replace idr_init() by idr_init

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Message-ID: <20201106082441.x2e5mmycikwd22pj@sirius.home.kraxel.org>
Date:   Fri, 6 Nov 2020 09:24:41 +0100
From:   Gerd Hoffmann <kraxel@...hat.com>
To:     Deepak R Varma <mh12gx2825@...il.com>
Cc:     Dave Airlie <airlied@...hat.com>, David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        virtualization@...ts.linux-foundation.org,
        spice-devel@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] drm/qxl: replace idr_init() by idr_init_base()

On Fri, Nov 06, 2020 at 12:20:16AM +0530, Deepak R Varma wrote:
> idr_init() uses base 0 which is an invalid identifier for this driver.
> The idr_alloc for this driver uses 1 as start value for ID range. The
> new function idr_init_base allows IDR to set the ID lookup from base 1.
> This avoids all lookups that otherwise starts from 0 since 0 is always
> unused / available.
> 
> References: commit 6ce711f27500 ("idr: Make 1-based IDRs more efficient")
> 
> Signed-off-by: Deepak R Varma <mh12gx2825@...il.com>

Pushed to drm-misc-next.

thanks,
  Gerd