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Message-ID: <CADRPPNTpOsp-mrzvR-=c6SqHuNfyx7y9+1p+x0ft4qu-mD_xcA@mail.gmail.com>
Date: Tue, 24 Nov 2020 16:13:15 -0600
From: Li Yang <leoyang.li@....com>
To: Wei Li <liwei391@...wei.com>, Zhao Qiang <qiang.zhao@....com>
Cc: "David S. Miller" <davem@...emloft.net>,
Jakub Kicinski <kuba@...nel.org>,
Paul Gortmaker <paul.gortmaker@...driver.com>,
Kumar Gala <galak@...nel.crashing.org>,
Timur Tabi <timur@...escale.com>,
Netdev <netdev@...r.kernel.org>,
linuxppc-dev <linuxppc-dev@...ts.ozlabs.org>,
lkml <linux-kernel@...r.kernel.org>, guohanjun@...wei.com
Subject: Re: [PATCH] net/ethernet/freescale: Fix incorrect IS_ERR_VALUE macro usages
On Tue, Nov 24, 2020 at 3:44 PM Li Yang <leoyang.li@....com> wrote:
>
> On Tue, Nov 24, 2020 at 12:24 AM Wei Li <liwei391@...wei.com> wrote:
> >
> > IS_ERR_VALUE macro should be used only with unsigned long type.
> > Especially it works incorrectly with unsigned shorter types on
> > 64bit machines.
>
> This is truly a problem for the driver to run on 64-bit architectures.
> But from an earlier discussion
> https://patchwork.kernel.org/project/linux-kbuild/patch/1464384685-347275-1-git-send-email-arnd@arndb.de/,
> the preferred solution would be removing the IS_ERR_VALUE() usage or
> make the values to be unsigned long.
>
> It looks like we are having a bigger problem with the 64-bit support
> for the driver that the offset variables can also be real pointers
> which cannot be held with 32-bit data types(when uf_info->bd_mem_part
> == MEM_PART_SYSTEM). So actually we have to change these offsets to
> unsigned long, otherwise we are having more serious issues on 64-bit
> systems. Are you willing to make such changes or you want us to deal
> with it?
Well, it looks like this hardware block was never integrated on a
64-bit SoC and will very likely to keep so. So probably we can keep
the driver 32-bit only. It is currently limited to PPC32 in Kconfig,
how did you build it for 64-bit?
>
> Regards,
> Leo
> >
> > Fixes: 4c35630ccda5 ("[POWERPC] Change rheap functions to use ulongs instead of pointers")
> > Signed-off-by: Wei Li <liwei391@...wei.com>
> > ---
> > drivers/net/ethernet/freescale/ucc_geth.c | 30 +++++++++++------------
> > 1 file changed, 15 insertions(+), 15 deletions(-)
> >
> > diff --git a/drivers/net/ethernet/freescale/ucc_geth.c b/drivers/net/ethernet/freescale/ucc_geth.c
> > index 714b501be7d0..8656d9be256a 100644
> > --- a/drivers/net/ethernet/freescale/ucc_geth.c
> > +++ b/drivers/net/ethernet/freescale/ucc_geth.c
> > @@ -286,7 +286,7 @@ static int fill_init_enet_entries(struct ucc_geth_private *ugeth,
> > else {
> > init_enet_offset =
> > qe_muram_alloc(thread_size, thread_alignment);
> > - if (IS_ERR_VALUE(init_enet_offset)) {
> > + if (IS_ERR_VALUE((unsigned long)(int)init_enet_offset)) {
> > if (netif_msg_ifup(ugeth))
> > pr_err("Can not allocate DPRAM memory\n");
> > qe_put_snum((u8) snum);
> > @@ -2223,7 +2223,7 @@ static int ucc_geth_alloc_tx(struct ucc_geth_private *ugeth)
> > ugeth->tx_bd_ring_offset[j] =
> > qe_muram_alloc(length,
> > UCC_GETH_TX_BD_RING_ALIGNMENT);
> > - if (!IS_ERR_VALUE(ugeth->tx_bd_ring_offset[j]))
> > + if (!IS_ERR_VALUE((unsigned long)(int)ugeth->tx_bd_ring_offset[j]))
> > ugeth->p_tx_bd_ring[j] =
> > (u8 __iomem *) qe_muram_addr(ugeth->
> > tx_bd_ring_offset[j]);
> > @@ -2300,7 +2300,7 @@ static int ucc_geth_alloc_rx(struct ucc_geth_private *ugeth)
> > ugeth->rx_bd_ring_offset[j] =
> > qe_muram_alloc(length,
> > UCC_GETH_RX_BD_RING_ALIGNMENT);
> > - if (!IS_ERR_VALUE(ugeth->rx_bd_ring_offset[j]))
> > + if (!IS_ERR_VALUE((unsigned long)(int)ugeth->rx_bd_ring_offset[j]))
> > ugeth->p_rx_bd_ring[j] =
> > (u8 __iomem *) qe_muram_addr(ugeth->
> > rx_bd_ring_offset[j]);
> > @@ -2510,7 +2510,7 @@ static int ucc_geth_startup(struct ucc_geth_private *ugeth)
> > ugeth->tx_glbl_pram_offset =
> > qe_muram_alloc(sizeof(struct ucc_geth_tx_global_pram),
> > UCC_GETH_TX_GLOBAL_PRAM_ALIGNMENT);
> > - if (IS_ERR_VALUE(ugeth->tx_glbl_pram_offset)) {
> > + if (IS_ERR_VALUE((unsigned long)(int)ugeth->tx_glbl_pram_offset)) {
> > if (netif_msg_ifup(ugeth))
> > pr_err("Can not allocate DPRAM memory for p_tx_glbl_pram\n");
> > return -ENOMEM;
> > @@ -2530,7 +2530,7 @@ static int ucc_geth_startup(struct ucc_geth_private *ugeth)
> > sizeof(struct ucc_geth_thread_data_tx) +
> > 32 * (numThreadsTxNumerical == 1),
> > UCC_GETH_THREAD_DATA_ALIGNMENT);
> > - if (IS_ERR_VALUE(ugeth->thread_dat_tx_offset)) {
> > + if (IS_ERR_VALUE((unsigned long)(int)ugeth->thread_dat_tx_offset)) {
> > if (netif_msg_ifup(ugeth))
> > pr_err("Can not allocate DPRAM memory for p_thread_data_tx\n");
> > return -ENOMEM;
> > @@ -2557,7 +2557,7 @@ static int ucc_geth_startup(struct ucc_geth_private *ugeth)
> > qe_muram_alloc(ug_info->numQueuesTx *
> > sizeof(struct ucc_geth_send_queue_qd),
> > UCC_GETH_SEND_QUEUE_QUEUE_DESCRIPTOR_ALIGNMENT);
> > - if (IS_ERR_VALUE(ugeth->send_q_mem_reg_offset)) {
> > + if (IS_ERR_VALUE((unsigned long)(int)ugeth->send_q_mem_reg_offset)) {
> > if (netif_msg_ifup(ugeth))
> > pr_err("Can not allocate DPRAM memory for p_send_q_mem_reg\n");
> > return -ENOMEM;
> > @@ -2597,7 +2597,7 @@ static int ucc_geth_startup(struct ucc_geth_private *ugeth)
> > ugeth->scheduler_offset =
> > qe_muram_alloc(sizeof(struct ucc_geth_scheduler),
> > UCC_GETH_SCHEDULER_ALIGNMENT);
> > - if (IS_ERR_VALUE(ugeth->scheduler_offset)) {
> > + if (IS_ERR_VALUE((unsigned long)(int)ugeth->scheduler_offset)) {
> > if (netif_msg_ifup(ugeth))
> > pr_err("Can not allocate DPRAM memory for p_scheduler\n");
> > return -ENOMEM;
> > @@ -2644,7 +2644,7 @@ static int ucc_geth_startup(struct ucc_geth_private *ugeth)
> > qe_muram_alloc(sizeof
> > (struct ucc_geth_tx_firmware_statistics_pram),
> > UCC_GETH_TX_STATISTICS_ALIGNMENT);
> > - if (IS_ERR_VALUE(ugeth->tx_fw_statistics_pram_offset)) {
> > + if (IS_ERR_VALUE((unsigned long)(int)ugeth->tx_fw_statistics_pram_offset)) {
> > if (netif_msg_ifup(ugeth))
> > pr_err("Can not allocate DPRAM memory for p_tx_fw_statistics_pram\n");
> > return -ENOMEM;
> > @@ -2681,7 +2681,7 @@ static int ucc_geth_startup(struct ucc_geth_private *ugeth)
> > ugeth->rx_glbl_pram_offset =
> > qe_muram_alloc(sizeof(struct ucc_geth_rx_global_pram),
> > UCC_GETH_RX_GLOBAL_PRAM_ALIGNMENT);
> > - if (IS_ERR_VALUE(ugeth->rx_glbl_pram_offset)) {
> > + if (IS_ERR_VALUE((unsigned long)(int)ugeth->rx_glbl_pram_offset)) {
> > if (netif_msg_ifup(ugeth))
> > pr_err("Can not allocate DPRAM memory for p_rx_glbl_pram\n");
> > return -ENOMEM;
> > @@ -2700,7 +2700,7 @@ static int ucc_geth_startup(struct ucc_geth_private *ugeth)
> > qe_muram_alloc(numThreadsRxNumerical *
> > sizeof(struct ucc_geth_thread_data_rx),
> > UCC_GETH_THREAD_DATA_ALIGNMENT);
> > - if (IS_ERR_VALUE(ugeth->thread_dat_rx_offset)) {
> > + if (IS_ERR_VALUE((unsigned long)(int)ugeth->thread_dat_rx_offset)) {
> > if (netif_msg_ifup(ugeth))
> > pr_err("Can not allocate DPRAM memory for p_thread_data_rx\n");
> > return -ENOMEM;
> > @@ -2721,7 +2721,7 @@ static int ucc_geth_startup(struct ucc_geth_private *ugeth)
> > qe_muram_alloc(sizeof
> > (struct ucc_geth_rx_firmware_statistics_pram),
> > UCC_GETH_RX_STATISTICS_ALIGNMENT);
> > - if (IS_ERR_VALUE(ugeth->rx_fw_statistics_pram_offset)) {
> > + if (IS_ERR_VALUE((unsigned long)(int)ugeth->rx_fw_statistics_pram_offset)) {
> > if (netif_msg_ifup(ugeth))
> > pr_err("Can not allocate DPRAM memory for p_rx_fw_statistics_pram\n");
> > return -ENOMEM;
> > @@ -2741,7 +2741,7 @@ static int ucc_geth_startup(struct ucc_geth_private *ugeth)
> > qe_muram_alloc(ug_info->numQueuesRx *
> > sizeof(struct ucc_geth_rx_interrupt_coalescing_entry)
> > + 4, UCC_GETH_RX_INTERRUPT_COALESCING_ALIGNMENT);
> > - if (IS_ERR_VALUE(ugeth->rx_irq_coalescing_tbl_offset)) {
> > + if (IS_ERR_VALUE((unsigned long)(int)ugeth->rx_irq_coalescing_tbl_offset)) {
> > if (netif_msg_ifup(ugeth))
> > pr_err("Can not allocate DPRAM memory for p_rx_irq_coalescing_tbl\n");
> > return -ENOMEM;
> > @@ -2807,7 +2807,7 @@ static int ucc_geth_startup(struct ucc_geth_private *ugeth)
> > (sizeof(struct ucc_geth_rx_bd_queues_entry) +
> > sizeof(struct ucc_geth_rx_prefetched_bds)),
> > UCC_GETH_RX_BD_QUEUES_ALIGNMENT);
> > - if (IS_ERR_VALUE(ugeth->rx_bd_qs_tbl_offset)) {
> > + if (IS_ERR_VALUE((unsigned long)(int)ugeth->rx_bd_qs_tbl_offset)) {
> > if (netif_msg_ifup(ugeth))
> > pr_err("Can not allocate DPRAM memory for p_rx_bd_qs_tbl\n");
> > return -ENOMEM;
> > @@ -2892,7 +2892,7 @@ static int ucc_geth_startup(struct ucc_geth_private *ugeth)
> > ugeth->exf_glbl_param_offset =
> > qe_muram_alloc(sizeof(struct ucc_geth_exf_global_pram),
> > UCC_GETH_RX_EXTENDED_FILTERING_GLOBAL_PARAMETERS_ALIGNMENT);
> > - if (IS_ERR_VALUE(ugeth->exf_glbl_param_offset)) {
> > + if (IS_ERR_VALUE((unsigned long)(int)ugeth->exf_glbl_param_offset)) {
> > if (netif_msg_ifup(ugeth))
> > pr_err("Can not allocate DPRAM memory for p_exf_glbl_param\n");
> > return -ENOMEM;
> > @@ -3026,7 +3026,7 @@ static int ucc_geth_startup(struct ucc_geth_private *ugeth)
> >
> > /* Allocate InitEnet command parameter structure */
> > init_enet_pram_offset = qe_muram_alloc(sizeof(struct ucc_geth_init_pram), 4);
> > - if (IS_ERR_VALUE(init_enet_pram_offset)) {
> > + if (IS_ERR_VALUE((unsigned long)(int)init_enet_pram_offset)) {
> > if (netif_msg_ifup(ugeth))
> > pr_err("Can not allocate DPRAM memory for p_init_enet_pram\n");
> > return -ENOMEM;
> > --
> > 2.17.1
> >
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